Moments passed before Gedrik realised that the figure's words were familiar to him. He did not truly understand them, but recognised the mantra from times he had spent working in the forge with Faergus.

It was a chant in praise of the Omnissiah. The Machine God.

The robed figure rose to face the aliens' leader and threw back his hood. Gedrik saw that most of the figure's face had been replaced by cybernetic implants. A brass-rimmed vox-unit nestled in the centre of his throat below his stitched lips, crackling with hissing white noise. Ribbed copper wiring curled from beneath his robes and plugged into his empty eye sockets, and meshed discs were sutured over the puckered skin where a normal man's ears would be. His flesh was pallid and grey, but despite all the deforming aspects of the figure's loathsome surgery, Gedrik could see that the man was clearly human, and the horror of such treachery made him want to cry with rage.

Cold agony began seeping into his body and he tried to scream, but unconsciousness swept over him and took the pain away.

The air was chill as Captain Uriel Ventris of the Ultramarines made his way up the thousand steps to the chapter master's chambers. He carried his helm in the crook of his arm and his stride was sure, the servo muscles in his suit of power armour making light work of the climb despite the slight limp from the wound he had suffered on Thracia nearly six months ago. The steps wound their way upwards along the side of the valley of Laponis, site of the most magnificent structure on Macragge, the Fortress of Hera, bastion of the Ultramarines.

Constructed from great slabs of marble quarried from the valley sides, the vast body of the structure was a gigantic, columned masterpiece, its surfaces white and pristine. Graceful balconies, golden geodesic domes and slender glass walkways, supported by angled silver-steel buttresses, gave the impression of both great strength and light, airy weightlessness.

The fortress monastery of the Ultramarines was a wonder of engineering, designed by the Chapter's primarch Roboute Guilliman and constructed during the days of the Emperor's Great Crusade ten thousand years ago. Since that time, the warriors of the Ultramarines Chapter of Space Marines had dwelt here.

The fortress sat amidst the tallest peaks in the valley of Laponis, surrounded by highland fir and alongside the mighty Hera's Falls. Glacial water thundered over the falls to the rocks, hundreds of metres below, and glittering rainbows arced across the narrow width of the valley. Uriel stopped and cast his gaze towards the falls, remembering the first time he had seen them and the sense of humbling awe he had felt. A smile touched his lips as he realised he still felt it.

He placed his hand on the pommel of his sword, feeling the weight of responsibility it represented. As he took in the elaborate detailing along the masterfully carved scabbard, his mind returned to the carnage on the rebel world of Thracia where his company commander and trusted friend, Captain Idaeus, had presented him with the magnificent weapon before going to his death.

Tasked with destroying a bridge to prevent the traitorous soldiers of Thracia from flanking an Imperial army, Idaeus's detachment had become trapped in a desperate battle against a huge enemy contingent attempting to force the bridge. For a day and a night, the thirty Ultramarines had held nearly a thousand soldiers at bay until heretical warriors of the Night Lords entered the fray.

Uriel shivered as he remembered his horror at the sight of his comrades crucified upon the hulls of the Night Lords' transports, and knew he would carry their pain-filled faces to his grave. The Traitor Marines had come close to overrunning the Ultramarines' position, but thanks to a desperate gamble by Idaeus, one that had cost him his life, the bridge had been destroyed and the attack defeated.

The feeling of grief at Idaeus's passing rose once more in his chest, but he suppressed it quickly, continuing his journey upwards. It would not do to keep his lord and master waiting.

He climbed higher up the steps, their centres worn smooth by the passage of uncounted footsteps, and briefly wondered exactly how many had made this climb before him. Eventually, he reached the wide esplanade at the summit and turned to look back on the route his climb had taken him.

Snow-capped mountains stretched as far as the eye could see in all directions save one. To the west, the horizon shimmered a deep, azure blue where Uriel's genetically enhanced vision could make out the rocky coastline and the sea, far in the distance. The domed and marble roofed structures of the fortress stepped down before him, each step a citadel in its own right.

He turned on his heel and strode towards the mighty structure before him, passing beneath the many columned portico that led to the chambers of the chapter master of the Ultramarines, Marneus Calgar. Gleaming bronze doors swung open as he approached and two massive warriors of the First Company, clad in holy suits of Terminator armour and carrying long bladed polearms stepped through, their weapons held at the ready.

Even Uriel's armoured physique was dwarfed by the bulk of the Terminators and Uriel nodded respectfully to the veterans as he passed, emerging into the cool air of the vestibule. A servant of the chapter master, dressed in a plain blue tunic, appeared at his side and took his helm, pointing towards the central courtyard of the structure without speaking. Uriel offered his thanks and descended the steps into the sunken courtyard, his gaze sweeping around and taking in every detail. Gold-stitched battle honours hung from the courtyard's balconies above shadowed cloisters, and statues of Ultramarines heroes from ancient times ringed a gurgling fountain set in its marbled centre. Here was Ancient Galatan, a former bearer of the Banner of Macragge, and there was Captain Invictus, hero of the First Company who had died fighting the Great Devourer.

The fountain was carved in the form of a mighty warrior upon a massive steed, his lance raised to the heavens. Konor, the first Battle King of Macragge, his face artfully carved, fully capturing the man's fierce determination to do the best for his people. Another servant arrived, carrying a tray upon which sat an earthenware jug and two silver goblets. He deposited them on the stone bench that encircled the fountain and silently withdrew. Uriel nervously clasped the hilt of his sword, wishing that he felt worthy of its history.

'Konor was a giant amongst men,' said a voice laden with centuries of authority and power. 'He pacified the entire continent before his twenty-first year and set in motion events that enabled the Holy Guilliman to become the man he needed to be.'

Uriel turned to face the Lord of Macragge, Marneus Calgar.

'I remember well from my teachings at the Agiselus Barracks, my lord,' replied Uriel, bowing low.

'A fine institution. Guilliman himself trained there.'

Uriel smiled at Calgar's modesty, knowing full well that the chapter master had trained there also.

The lord of the Ultramarines was a giant of a man, even by the standards of the Space Marines. The lustre of his blue armour barely seemed able to contain his sheer dynamism and power, the bronze two-headed Imperial eagle on his right shoulder shining like polished gold. Black rings hung from the lobe of his right ear and his left eye had been replaced with a flat, gem-like bionic version, fine copper wiring trailing from its mechanics to the back of his skull. Calgar's venerable face appeared to be carved from oak, yet he had lost none of his cunning or insight. Over four hundred years old, his strength and vitality were the envy of warriors half his age.

'Well met, brother,' greeted Calgar, slapping both palms upon the shoulder guards of Uriel's armour. 'It is good to see you, Uriel. My pride and my admiration are yours. The victories on Thracia were honourable.'